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Learn about the anatomical divisions of the neck created by the major muscles, such as sternocleidomastoid. Find out the clinical relevance of the triangles of the neck for palpable masses in the region.
The anterior triangle is a region of the neck with the apex inferior to the base. It contains muscles, nerves, and fascia, and is subdivided into four smaller triangles by the digastricus and omohyoideus.
The infrahyoid muscles are a group of four pairs of muscles in the anterior part of the neck that depress the hyoid bone and larynx. They are innervated by the ansa cervicalis or the cervical spinal nerve and originate from or insert on the hyoid bone.
The suboccipital triangle is a region of the neck bounded by three muscles that move the head. It contains the vertebral artery, the suboccipital nerve and the suboccipital venous plexus.
Learn about the anatomy, function and clinical significance of the supraclavicular nerves, a branch of the cervical plexus that innervates the skin over the shoulder. Find out how they are blocked during shoulder surgery and what are their anatomical terms.
The submental triangle is a division of the anterior triangle of the neck, bounded by the digastricus, hyoid bone and mylohyoideus muscles. It contains lymph nodes, veins and nerves in the superficial fascia over the roof of the triangle.
The subclavian triangle is a space bounded by the clavicle, the sternocleidomastoideus and the omohyoideus muscles. It contains the subclavian artery, vein, brachial plexus and other structures related to the neck and arm.
The suprascapular nerve is a mixed nerve that branches from the upper trunk of the brachial plexus and innervates the supraspinatus and infraspinatus muscles of the shoulder. It also provides sensory innervation to the acromioclavicular and glenohumeral joints.